Video: Puas yog molar kub ntawm combustion zoo los yog tsis zoo?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kub ntawm combustion yog quoted li zoo tus lej thaum lub enthalpy hloov ntawm combustion Cov tshuaj tiv thaiv (ΔH) raug suav hais tias yog tsis zoo num, as combustion cov tshuaj tiv thaiv yog ib txwm exothermic.
Ntxiv mus, yog kub ntawm combustion zoo los yog tsis zoo?
Kub ntawm combustion tseem hu ua enthalpy ntawm combustion . Thaum ib yam khoom raug combustion nws tso zis zog. combustion yog ib txwm exothermic, hloov enthalpy rau cov tshuaj tiv thaiv yog tsis zoo , ΔH muaj a tsis zoo kos npe.
Ib yam li ntawd, dab tsi cuam tshuam rau qhov kub ntawm combustion? Cov tshuaj tiv thaiv tshuaj feem ntau yog hydrocarbon lossis lwm cov organic molecule reacting nrog oxygen los tsim carbon dioxide thiab dej thiab tso tawm. kub . Nws tuaj yeem hais nrog qhov ntau: lub zog / mole ntawm roj. zog/mas roj.
Kub ntawm combustion rooj.
| Roj | Ethanol |
|---|---|
| MJ/kg | 29.7 |
| BTU/lb | 12, 800 |
| kJ/mol | 1, 300.0 |
Tsis tas li ntawd, molar kub ntawm combustion yog dab tsi?
Molar Thaum tshav kub kub combustion . Cov molar kub ntawm combustion yog tus nqi ntawm kub tso tawm los ntawm kev ua tiav combustion (kev tshwm sim nrog oxygen gas los tsim dej thiab carbon dioxide) ntawm ib qho mole ntawm ib yam khoom. Cov molar kub ntawm combustion yog qhia hauv J/mol (los yog kJ/mol).
Dab tsi yog qhov txawv ntawm qhov kub ntawm combustion thiab enthalpy ntawm combustion?
Cov kub ntawm combustion (ΔH∘c) yog lub zog tso tawm raws li kub thaum ib tug compound undergoes tiav combustion nrog cov pa oxygen raws li cov txheej txheem. Cov molar enthalpy ntawm combustion yog pes tsawg lub zog tawm ib kJ/mol.
Pom zoo:
Yog vim li cas combustion tiav yog zoo dua li tsis tiav combustion?
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